Recording medium, recording method, recording apparatus, and reproduction method

ABSTRACT

A recording medium, comprising a lead-in area, a data recording area that is formed on an outer periphery side of the lead-in area and in which a plurality of pieces of content data is recorded, and a lead-out area formed on an outer periphery side of the data recording area, wherein first copyright management information and second copyright management information with which copyrights of the plurality of pieces of content data are managed are recorded at different positions whose secrecies are different from each other.

TECHNICAL FIELD

[0001] The present invention relates to a recording medium for recordingcontent data, a recording method and an apparatus for recording contentdata, and a reproducing method for reproducing content data, inparticular to those that allow a conventional reproducing apparatus toreproduce content data and copyright of content data to be protected.

BACKGROUND ART

[0002] A new type optical disc from which a conventional CD-DA (CompactDisc Digital Audio) player and a CD-ROM (Compact Disc Read Only Memory)can reproduce data and that has a compatibility with a computer has beendeveloped. In the new type optical disc, content data is encrypted andrecorded so as to protect the copyright thereof. It is considered thatkey information for encrypted content data will be recorded in a lead-inregion.

[0003] In other words, when content data is encrypted and recorded,there is a problem about the position of the key information. To safelymanage key information, it is preferred to store it at a position theuser cannot easily access. Thus, when video data is recorded to forexample a DVD (Digital Versatile Disc), key information is recorded in aread-in area and encrypted data is recorded in a program area. Thus, insuch a new type optical disc, to prevent the user from easily accessingkey information, it is considered that the key information is recordedin the lead-in area.

[0004] In the case of the DVD, since it has been developed on conditionthat content data is encrypted to protect the copyright it. Thus, whenkey information is recorded in the lead-in area, no considerable problemoccurs. However, in the case of such a new type optical disc, if keyinformation were recorded in a lead-in area, the conventional player anddrive, which cannot deal with the new type optical disc, could notreproduce content data.

[0005] In other words, the conventional CD-DA disc and CD-ROM disc havenot been developed on condition that encrypted content data is recorded.Thus, the conventional player and drive do not have a function fordecrypting encrypted content data. When encrypted data that is read fromthe new type optical disc is decrypted by the conventional player anddrive, it is considered that a decrypting process for content data isperformed by software.

[0006] However, while the conventional player and driver are reproducingcontent data from an optical disc, the lead-in area cannot be accessedby the software. In other words, in the CD-ROM standard, the disc isaccessed sector by sector, each of which is composed of 98 frames. Whilethe conventional player and drive are reproducing content data, theyaccess the disc sector by sector. Thus, the conventional player anddrive cannot access the lead-in area. Consequently, when key informationis recorded in the lead-in areas, since the conventional player anddrive, which cannot deal with such the new type optical disc, cannotaccess the key information, they cannot decrypt content data.

[0007] A player and a drive that can deal with the new type optical discwill be released after it is decided that key information is recorded inthe lead-in area. The player and drive will be designed so that theyaccess the lead-in area, obtain key information, and decrypt encryptedcontent data with the obtained key information. Thus, when the playerand drive that can deal with the new type optical disc become common,the problem of the conventional player and drive that cannot access keyinformation in the lead-in area and reproduce content data will besolved.

[0008] In a transitional period until the player and drive that can dealwith the new type optical disc become common, the conventional playerand drive, which cannot deal with the new type optical disc, readsencrypted content data from the new type optical disc and decrypts theencrypted content data. In such a transitional period, however, sincethe key information in the lead-in area cannot be accessed, there willbe a problem of which encrypted content data cannot be decrypted.

[0009] To solve such a problem, it is considered that key information isrecorded in a program area so that the conventional drive and player,which cannot deal with the new type optical disc, can decrypt contentdata.

[0010] However, the secrecy of key information recorded in the programarea is lower than that recorded in the lead-in area. Thus, when keyinformation is recorded in the program area, although the conventionaldrive and player, which cannot deal with the new type optical disc, candecrypt content data, the key information recorded in the program areais illegally taken out. As a result, it is considered that since thecontent data will be illegally reproduced and copied, the copyrightthereof cannot be protected.

[0011] Therefore, an object of the present invention is to provide arecording medium, a recording method and apparatus, and a reproducingmethod that allow a reproducing apparatus that cannot deal withencrypted content data to decrypt encrypted content data and that thecopyright thereof to be securely protected.

DISCLOSURE OF THE INVENTION

[0012] The present invention is a data recording medium on which aplurality of pieces of content data are recoded in a program area, twotypes of copyright management information that are first and secondcopyright management information for managing copyrights of theplurality of pieces of content data being recorded at differentpositions whose secrecies are different from each other.

[0013] The present invention is a data recording method, comprisingsteps of recording a plurality of pieces of content data in a programarea of a data recording medium, and recording two types of copyrightmanagement information that are first and second copyright managementinformation at different positions whose secrecies are different fromeach other.

[0014] The present invention is a data recording apparatus comprisingmeans for recording a plurality of pieces of content data in a programarea of a data recording medium, and means for recording two types ofcopyright management information that are first and second copyrightmanagement information at different positions whose secrecies aredifferent from each other.

[0015] The present invention is a data recording medium on which aplurality of pieces of content data are encrypted and recorded in aprogram area, at least two types of key information that are first andsecond key information being recorded at different positions whosesecrecies are different from each other.

[0016] The present invention is a data recording method, comprising thesteps of encrypting a plurality of pieces of content data and recordingthe encrypted plurality of pieces of content data to a program area of adata recording medium and recording at least two types of keyinformation that are first and second key information at differentpositions whose secrecies are different from each other.

[0017] The present invention is a data recoding apparatus comprisingmeans for encrypting a plurality of pieces of content data and recordingthe encrypted plurality of pieces of content data to a program area of adata recording medium and means for recording at least two types of keyinformation that are first and second key information at differentpositions whose secrecies are different from each other.

BRIEF DESCRIPTION OF DRAWINGS

[0018]FIG. 1 is a plan view for describing an example of an optical discaccording to the present invention;

[0019]FIG. 2 is a schematic diagram for describing an example of theoptical disc according to the present invention;

[0020]FIG. 3 is a schematic diagram for describing a key locker;

[0021]FIG. 4 is a schematic diagram for describing an example of theoptical disc,

[0022]FIG. 5 is a block diagram for describing an encrypting process forthe optical disc;

[0023]FIG. 6 is a block diagram for describing a decrypting process forthe optical disc;

[0024]FIG. 7 is a schematic diagram for describing a key locker of theoptical disc;

[0025]FIG. 8 is a schematic diagram for describing a key locker of theoptical disc;

[0026]FIG. 9 is a schematic diagram for describing a key locker of theoptical disc;

[0027]FIG. 10 is a schematic diagram for describing a key locker of theoptical disc;

[0028]FIG. 11A and FIG. 11B are a block diagram for describing anencrypting process for the optical disc according to the presentinvention;

[0029]FIG. 12 is a block diagram for describing a decrypting process forthe optical disc according to the present invention;

[0030]FIG. 13 is a block diagram for describing a decrypting process forthe optical disc according to the present invention;

[0031]FIG. 14 is a block diagram for describing a key locker of theoptical disc according to the present invention;

[0032]FIG. 15 is a block diagram for describing a key locker of theoptical disc according to the present invention;

[0033]FIG. 16A and FIG. 16B are a block diagram of an example of anoptical disc recoding apparatus according to the present invention;

[0034]FIG. 17 is a block diagram showing an example of a reproducingapparatus for reproducing data from the optical disc according to thepresent invention;

[0035]FIG. 18 is a block diagram showing another example of thereproducing apparatus for reproducing data from the optical discaccording to the present invention; and

[0036]FIG. 19 is a flow chart for describing another example of thereproducing apparatus for reproducing data from the optical discaccording to the present invention.

BEST MODES FOR CARRYING OUT THE INVENTION

[0037] Next, with reference to the accompanying drawings, an embodimentof the present invention will be described. FIG. 1 and FIG. 2 show astructure of an optical disc according to the present invention. Thediameter of the optical disc 1 according to the present invention is 120mm. A hole 2 is formed at the center of the optical disc 1. The physicalshape of the optical disc 1 is the same as that of the conventional CD.There is another optical disc 1 having a diameter of 80 mm, which isreferred to as CD single.

[0038] In addition, there are three types of optical discs 1 categorizedas reproduction only type optical disc, write once type optical disc,and recordable type optical disc.

[0039] In the reproduction only type optical disc 1, a recording layeris made of aluminum. In the reproduction only type optical disc 1,information is recorded as physical pits. Normally, such a disc isproduced by a stamper.

[0040] In the write once type optical disc 1, a recording layer is madeof an organic coloring matter such as phthalocyanine or cyanine. In thewrite once type optical disc, when data is written, the temperature ofthe recording layer made of an organic coloring matter on the disc israised by laser light. As a result, the recording layer made of thecoloring matter is thermally deformed.

[0041] In the rewritable type optical disc 1, a recording layer is madeof a phase change material. The phase change material is for example analloy of Ag—In—Sb—Te (silver—indium—antimony—tellurium) is used. Such aphase change material has a crystal phase and an amorphous phase. Whenthe output level of the laser light is high, namely the intensity of thelaser light is high, the temperature of the recording layer made of thephase change material is raised over the melting point and then quicklycooled. As a result, the recording layer becomes an amorphous state.When the output level of the laser light is low, namely the intensity ofthe laser light is relatively low, the temperature of the recordinglayer made of the phase change material is raised and then graduallycooled. As a result, the recording layer becomes a crystal state.

[0042] As shown in FIG. 2, a first lead-in area LI1 is formed on theinnermost periphery of the optical disc. On the outer periphery of thelead-in area LI1, a first program area PA1 is formed. On the outerperiphery of the first program area PA1, a first lead-out area LO1 isformed. In the first program area PA1, audio content data is recorded inthe same recording format as the CD-DA (Compact Disc Digital Audio)standard.

[0043] Outside the first lead-out area LO1, a second lead-in area LI2 isformed. On the outer periphery of the lead-in area LI2, a second programarea PA2 is formed. Outside the second program area PA2, a secondlead-out area is formed. In the second program area LO2, audio data thathas been compressed corresponding to for example ATRAC3 compressingsystem is encrypted and recorded as content data.

[0044] Content key data with which encrypted content data in the secondprogram area PA2 is decrypted is contained in first key locker dataK_LOCK1 and recorded in the second lead-in area LI2.

[0045] To allow the conventional drive, which cannot deal with theoptical disc 1 to decrypt encrypted content data, content key data withwhich encrypted content data in the second program area PA2 is decryptedis contained in second key locker data K_LOCK2 and recorded in theprogram area PA2.

[0046] In addition, application data of a software player SFT1 that is adecryption process program for decrypting encrypted content datarecorded in the program area PA2 is recorded in the program area PA2.

[0047] The key locker data K_LOCK1 and K_LOCK2 are data of which contentkey data has been encoded and encrypted. The key locker data K_LOCK1 andK_LOCK2 also contain copyright management information DRM (DigitalRights Management).

[0048] Key locker data is data of which a plurality of pieces of contentkey data are encoded and encrypted. Since a plurality of pieces ofcontent key data which have been encoded and encrypted can be treated asa real locker that stores a plurality of content keys. Thus, they arereferred to as key locker data.

[0049] In addition, copyright management information DRM with whichcopyright managements such as reproduction restrictions and copyrestrictions of individual pieces of content data are performed can becontained in the key locker data. With the copyright managementinformation DRM, for example “only reproduction” and “reproduction andcopy permitted” can be designated. In addition, “copy restrictions”, thenumber of copies in the copy restrictions such as “one copy”, “fivecopies”, and so forth can be designated. In addition, it is consideredthat “net distribution or distributed data copy permitted” isdesignated.

[0050]FIG. 3 is an example of the structure of a key locker portion. Asshown in FIG. 3, at the beginning of the key locker portion, a dataportion that represents a version number is formed. Next, a data portionthat represents the number of pieces of content key data is formed.Next, content key data KC1, KC2, . . . corresponding to the number ofpieces of the content key data are formed. The content key data KC1,KC2, . . . are composed of for example of 48 bytes each. Next, a dataportion that represents the number of pieces of the copyright managementinformation is formed. Next, copyright management information DRM1,DRM2, . . . corresponding to the number of pieces that the data portionrepresents are formed. The copyright management information DRM1, DRM2 .. . are composed of 16 bytes each. Next, a CRC (Cyclic Redundancy Check)code with which an error of 16 bytes is detected is added. The structureof the key locker data shown in FIG. 3 is just an example. Thus, the keylocker data may have another structure.

[0051] The format of the key locker data K_LOCK1 recorded in the lead-inarea LI2 is different from the format of the key locker data K_LOCK2recorded in the program area PA2. In other words, the key locker dataK_LOCK1 in the high secrecy lead-in area LI2 has higher added valuesthan the key locker data K_LOCK2 in the low secrecy program area.

[0052] Thus, as shown in FIG. 2, in the optical disc 1 according to thepresent invention, the first key locker data K_LOCK1 is recorded in thelead-in area LI2 and the second key locker data K_LOCK2 is recorded inthe program area PA2.

[0053] When the player and drive that can deal with the optical disc 1and that will be released in near future reproduce content data from theoptical disc 1, they access the lead-in area LI2 and read data from thefirst key locker data K_LOCK1. The first key locker data K_LOCK1contains content key data KC1, KC2, . . . with which individual piecesof encrypted content data recorded in the program area PA2 of theoptical disc 1 are decrypted. By taking out the content key data KC1,KC2, . . . from the key locker data K_LOCK1, the encrypted content datain the program area PA2 can be decrypted.

[0054] By performing a software process for accessing the program areaPA2, the conventional player and drive, which cannot deal with theoptical disc 1, can read data from the second key locker data K_LOCK2.In other words, the player and drive can take out the content key dataKC1, KC2, . . . from the second key locker data and perform a decryptingprocess for the encrypted content data recorded in the program area PA2with the content key data KC1, KC2, . . .

[0055] Next, an encrypting process and a decrypting process for contentdata of the optical disc 1 according to the present invention will bedescribed. Before describing the encrypting process and the decryptingprocess for the optical disc 1 according to the present invention, theirbasic encrypting process and decrypting process will be described.

[0056] In an optical disc 1A for which the basic encrypting anddecrypting processes will be described, as shown in. FIG. 4, on theinnermost periphery of the optical disc 1A, a first lead-in area LI10 isformed. On the outer periphery of the lead-in area LI10, a first programarea PA10 is formed. Outside the first program area PA10, a firstlead-out area LO10 is formed. In the first program area PA10, audiocontent data has been recorded in the same recording format as the CD-DAstandard. Outside the first lead-out area LO10, a second lead-in areaLI20 is formed. On the outer periphery of the lead-out area LI20, asecond program area PA20 is formed. Outside-the second program area, asecond lead-out area LO20 is formed. In the second program area PA20,content data that had been compressed corresponding to for exampleATRAC3 and encrypted has been recorded. Content key data with whichencrypted content data recorded in the second program area PA20 isdecrypted is contained in a key locker K_LOCK0 and recorded in thesecond lead-in area LI20.

[0057]FIG. 5 shows a process for encrypting content data and recordingit to the second program area PA20 of the conventional optical disc 1A.

[0058] In FIG. 5, content data C1, C2, . . . are supplied to contentdata input terminals 11A, 11B, . . . , respectively. The content dataC1, C2, . . . are for example audio data of music programs compressedcorresponding to for example ATRAC3. The content data C1, C2, . . .supplied from the content data input terminals 11A, 11B, . . . aresupplied to encrypting circuits 12A 12B, . . . , respectively.

[0059] Content key data KC1, KC2, . . . with which the individualcontent data C1, C2, . . . are encrypted are generated by a content keygenerating circuit 13. The content key data KC1, KC2, . . . suppliedfrom the content key generating circuit 13 are supplied to theencrypting circuits 12A 12B, . . . , respectively.

[0060] The content data C1, C2, . . . supplied from the content datainput terminals 11A, 11B, . . . are encrypted with the content key dataKC1, KC2, . . . by the encrypting circuits 12A 12B, . . . ,respectively. Content data C1 e, C2 e, . . . that have been encrypted bythe encrypting circuits 12A 12B, . . . are recorded in a program areaPA2 of the optical disc.

[0061] The content key data KC1, KC2, . . . supplied from the contentkey generating circuit 13 are supplied to a key locker generatingcircuit 14.

[0062] The individual content data C1, C2, . . . supplied to the contentdata input terminals 11A, 11B, . . . contain copyright managementinformation DRM1, DRM2, . . . , respectively. The copyright managementinformation DRM1, DRM2, . . . are information that representsreproduction restrictions and copy restrictions with respect to thecopyright management for individual pieces of content data. Thecopyright management information DRM1, DRM2, . . . are generated by aDRM generating circuit 15. With the copyright management informationDRM1, DRM2, . . . , reproduction permission or prohibition, copypermission or prohibition, one generation copy permission ormulti-generation copy permission, and so forth can be designated. Thecopyright management information DRM1, DRM2, . . . generated by the DRMgenerating circuit 15 are supplied to the key locker generating circuit14.

[0063] The key locker generating circuit 14 encodes the content key dataKC1, KC2, . . . sent from the content key generating circuit 13 and thecopyright management information DRM1, DRM2, . . . supplied from the DRMgenerating circuit 15 and generates key locker data. Output data of thekey locker generating circuit 14 is supplied to an encrypting circuit18.

[0064] Key locker key data KL is supplied from a hash calculatingcircuit 16 to the encrypting circuit 18. The key locker key data KL isgenerated by hash calculating device key data KD and hidden code keydata KH. The key locker data generated by the key locker generatingcircuit 14 is encrypted with the key locker key data KL supplied fromthe hash calculating circuit 16.

[0065] In other words, the device key data KD is supplied to the hashcalculating circuit 16. In addition, the hidden code key data KH issupplied from a hidden code key generating circuit 17 to the hashcalculating circuit 16. The device key data KD is stored somewhere inthe player and recorder. The hidden code key data KH is generated as arandom number by the hidden code key generating circuit 17. The hiddencode key data KH is recorded in for example a lead-in area LI20 of theoptical disc 1A.

[0066] The hash calculating circuit 16 generates the key locker key dataKL with the device key data KD and the hidden code key data KH. The keylocker key data KL is supplied to the encrypting circuit 18. Theencrypting circuit 18 encrypts the key locker key data KL supplied fromthe key locker generating circuit 14 with the key locker key data KLsupplied from the hash calculating circuit 16. Data that is recorded tokey locker data K_LOCK0 encrypted by the encrypting circuit 18 isrecorded in the lead-in area LI20 of the optical disc 1A.

[0067] Thus, in the encrypting process of the conventional optical disc1A, the individual content data C1, C2, . . . are encrypted with thecontent key data KC1, KC2, . . . , respectively and recorded in theprogram area LI20. The content key data KC1, KC2, . . . with which theindividual content data C1, C2, . . . are encrypted are stored alongwith the copyright management information DRM1, DRM2, . . . in the keylocker data K_LOCK0 and encrypted and recorded in the lead-in area LI20of the optical disc 1A.

[0068]FIG. 6 shows a process for decrypting the encrypted content dataC1 e, C2 e, . . . recorded on the optical disc 1A and obtaining thecontent data C1, C2, . . . , respectively.

[0069] The encrypted content data C1 e, C2 e, . . . are read from theprogram area PA20. The encrypted content data C1 e, C2 e, . . . aresupplied to decrypting circuits 23A, 23B, . . . , respectively.

[0070] The encrypted key locker data K_LOCK0 and the hidden code keydata KH are reproduced from the lead-in area LI20 of the optical disc1A. The key locker data K_LOCK0 is sent to a decrypting circuit 26. Onthe other hand, the hidden code key data KH is sent to a hashcalculating circuit 22.

[0071] Device key data KD that is stored somewhere in the reproducingapparatus or device is taken out. The device key data KD is sent to thehash calculating circuit 22. The hash calculating circuit 22 generateskey locker key data KL with the hidden code key data KH and the devicekey data KD. The key locker key data KL is sent to the decryptingcircuit 26.

[0072] The decrypting circuit 26 decrypts encrypted data recorded in thekey locker K_LOCK0 with the key locker key data KL supplied from thehash calculating circuit 22. Data that is read from the decrypted keylocker data K_LOCK0 is sent to a key locker reproducing circuit 21. Thekey locker reproducing circuit 21 takes out content key data KC1, KC2, .. . and copyright management information DRM1, DRM2, . . . from the datathat is read from the key locker K_LOCK0.

[0073] The content key data KC1, KC2, . . . taken out by the key lockerreproducing circuit 21 are supplied to decrypting circuits 23A, 23B, . .. , respectively. The copyright management information DRM1, DRM2, . . .taken out by the key locker reproducing circuit 21 are sent to a DRMdetermining circuit 24.

[0074] The DRM determining circuit 24 determines reproductionrestrictions and copy restrictions for the individual content data C1,C2, . . . with the copyright management information DRM1, DRM2, . . .thereof. Information of the reproduction restrictions and copyrestrictions for the individual content data C1, C2, . . . is suppliedto a copy and reproduction controlling circuit 25.

[0075] The decrypting circuits 23A, 23B, . . . decrypt the encryptedcontent data C1 e, C2 e, . . . reproduced from the program area PA20 ofthe optical disc 1A and obtain content data C1, C2, . . . ,respectively. The decrypted content data C1, C2, . . . are supplied tothe copy and reproduction controlling circuit 25.

[0076] The copy and reproduction controlling circuit 25 performsreproduction restrictions and copy restrictions for the individualcontent data C1, C2, . . . corresponding to the information of thereproduction restrictions and copy restrictions supplied from the DRMdetermining circuit 24.

[0077] Thus, in the decrypting process for the optical disc 1A, the keylocker data K_LOCK0 is read from the lead-in area LI20 of the opticaldisc 1A. The key locker reproducing circuit 21 takes out the content keydata KC1, KC2, . . . and the copyright management information DRM1,DRM2, . . . from the key locker data K_LOCK0. The encrypted content dataC1 e, C2 e, . . . that have been read from the program area PA20 of theoptical disc are sent to the decrypting circuits 23A, 23B, . . . ,respectively. The content data C1, C2, . . . are decrypted with thecontent key data KC1, KC2, . . . extracted from the key locker dataK_LOCK0 in the lead-in area LI20. The key locker reproducing circuit 21extracts the copyright management information DRM1, DRM2, . . . . Withthe copyright management information DRM1, DRM2, . . . , reproductionsand copies of the individual content data C1, C2, . . . are controlled.

[0078] In such a manner, the individual content data C1, C2, . . . ofthe optical disc 1A are individually encrypted. The individual contentdata C1, C2, . . . contain the copyright management information DRM1,DRM2, . . . , respectively. Reproduction conditions and copy conditionscan be individually designated for the individual content data C1, C2, .. . Thus, with the same content data recorded in the program area PA20,when the number of pieces of content key data KC1, KC2, . . . stored inthe key locker data K_LOCK0 is changed or the reproduction restrictionsand copy restrictions of the copyright management information DRM1,DRM2, . . . stored in the key locker data K_LOCK are changed,reproducible content data, reproduction conditions, and copy conditionscan be changed.

[0079] In other words, in examples shown in FIG. 7 and FIG. 8, the samecontent data C1, C2, C3, C4, and C5 have been recorded in a program areaPA2 of an optical disc. In the example shown in FIG. 7, all content keydata KC1, KC2, KC3, KC4, and KC5 and copyright management informationDRM1, DRM2, DRM3, DRM4, and DRM5 for the content data C1, C2, C3, C4,and C5 have been recorded. In that case, when the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 represent reproductionpermissions, all the content data C1, C2, C3, C4, and C5 can bedecrypted.

[0080] In the example shown in FIG. 8, although the content data C1, C2,C3, C4, and C5 have been recorded on the optical disc 1A like in theexample shown in FIG. 7, only the content key data KC1, KC2, and KC3 andthe copyright management information DRM1, DRM2, and DRM3 for thecontent data C1, C2, and C3 have been recorded in the key locker dataK_LOCK0. In that case, although the content data C1, C2, C3, C4, and C5have been recorded on the optical disc 1A, only the content data C1, C2,and C3 can be reproduced.

[0081] Thus, even if the same content data is recorded on the opticaldisc 1A, when the number of pieces of content key data stored in the keylocker data K_LOCK0 is restricted, the number of pieces of reproduciblecontent data can be restricted.

[0082] In examples shown in FIG. 9 and FIG. 10, the same content dataC1, C2, C3, C4, and C5 have been recorded in the program area PA20 ofthe optical disc 1A. In the example shown in FIG. 9, the content keydata KC1, KC2, KC3, KC4, and KC5 and the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 that represent copypermissions have been recoded in the key locker data K_LOCK0. In thatcase, since all the copyright management information DRM1, DRM2, DRM3,DRM4, and DRM5 represent copy permissions, all the content data C1, C2,C3, C4, and C5 can be copied.

[0083] In the example shown in FIG. 10, although the content data C1,C2, C3, C4, and C5 have been recorded on the optical disc 1A as in theexample shown in FIG. 9, the content key data KC1, KC2, KC3, KC4, andKC5 and the copyright management information DRM1, DRM2, DRM3, DRM4, andDRM5 that represent copy prohibitions have been recorded in the keylocker data K_LOCK0. In that case, since all the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 represent copyprohibitions, the content data C1, C2, C3, C4, and C5 cannot be copied.

[0084] Thus, even if the same content data C1, C2, C3, C4, and C5 arerecorded on the optical disc 1A, when the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 stored in the key lockerdata K_LOCK0 are changed, the number of pieces of reproducible contentdata, copy conditions, and reproduction conditions are changed.

[0085] According to the embodiment of the present invention, using thatstructure, even if data is reproduced from the same disc, the number ofpieces of reproducible content data, the copy conditions, andreproduction conditions can be changed depending on whether the drivethat can deal with the optical disc 1 or the conventional drive thatcannot deal with the optical disc 1 is used.

[0086] Next, the encrypting process and the decrypting process for theoptical disc 1 according to the present invention will be described.

[0087]FIG. 11A and FIG. 11B show the encrypting process for the opticaldisc 1 according to the present invention. In FIG. 11A and FIG. 11B,content data C1, C2, . . . are supplied to content data input terminals31A, 31B, 31C, . . . , respectively. The content data C1, C2, . . . arecontent data that has been compressed corresponding to for exampleATRAC3. The content data C1, C2, . . . supplied from the content datainput terminals 31A, 31B, 31C, . . . are supplied to encrypting circuits32A, 32B, . . . , respectively.

[0088] Content key data KC1, KC2, . . . with which the individualcontent data C1, C2, . . . are encrypted are generated by a content keygenerating circuit 33. The content key data KC1, KC2, . . . are suppliedto the encrypting circuits 32A, 32B, . . . , respectively.

[0089] The encrypting circuits 32A, 32B, . . . encrypt the content dataC1, C2, . . . supplied from the content data input terminals 31A, 31B, .. . with the content key data KC1, KC2, . . . supplied from the contentkey generating circuit 33, respectively. Content data C1 e, C2 e, . . .encrypted by the encrypting circuits 32A, 32B, . . . are recorded in aprogram area PA2 of the optical disc 1.

[0090] The content key data KC1, KC2, . . . supplied from the contentkey generating circuit 33 are supplied to selectors 38A and 38B. Theselectors 38A and 38B select desired content key data from the contentkey data KC1, KC2, . . . generated by the content key generating circuit33. Content key data selected by the selectors 38A and 38B is suppliedto key locker generating circuits 34A and 34B, respectively.

[0091] The individual content data C1, C2, . . . supplied to the contentdata input terminals 31A, 31B, . . . contains copyright managementinformation DRM1, DRM2, . . . , respectively. The copyright managementinformation DRM1, DRM2, . . . are information of reproductionrestrictions and copy restrictions with respect to the copyrightmanagement for content data. With the copyright management informationDRM1, DRM2, . . . , reproduction permission or prohibition, copypermission or prohibition, one generation copy permission ormulti-generation copy permission, and so forth can be designated.

[0092] A DRM generating circuit 35A generates copyright managementinformation DRM1A, DRM2A, DRM3A, . . . to be recorded in the read-inarea LI2. The copyright management information DRM1A, DRM2A, DRM3A, . .. generated by the DRM generating circuit 35A are supplied to a selector39A.

[0093] A DRM generating circuit 35B generates copyright managementinformation DRM1B, DRM2B, . . . to be recorded in the program area PA2.The copyright management information DRM1B, DRM2B, . . . generated bythe DRM generating circuit 35B are supplied to a selector 39B.

[0094] The selectors 39A and 39B select desired copyright managementinformation from the copyright management information DRM1A, DRM2A, . .. generated by the DRM generating circuit 35A and from the copyrightmanagement information DRM1B, DRM2B, . . . generated by the DRMgenerating circuit 35B. The copyright management information selected bythe selectors 39A and 39B is supplied to the key locker generatingcircuits 34A and 34B.

[0095] The key locker generating circuit 34A encodes the content keydata KC1, KC2, . . . sent from the content key generating circuit 33 andthe copyright management information DRM1A, DRM2A, . . . sent from theDRM generating circuit 35A and generates data to be recorded in the keylocker portion. Output data of the key locker generating circuit 34A issupplied to an encrypting circuit 41A.

[0096] Key locker key data KL1 is supplied from a hash calculatingcircuit 36A to the encrypting circuit 41A. The key locker key data KL1is generated by hash calculating device key data KD and hidden code keydata KH1. With the key locker key data KL1, data supplied from the keylocker generating circuit 34A and to be recorded in the key lockerportion is encrypted.

[0097] In other words, the device key data KD is supplied to the hashcalculating circuit 36A. In addition, the hidden code key data KH1supplied from a hidden code key generating circuit 37A is supplied tothe hash calculating circuit 36A. The device key data KD is storedsomewhere in the player and recorder. The hidden code key data KH1 isgenerated as a random number by the hidden code key generating circuit37A. The hidden code key data KH1 is recorded in for example the lead-inarea LI2 of the optical disc 1.

[0098] With the device key data KD and the hidden code key data KH1generated by the hidden code key generating circuit 37A, the hashcalculating circuit 36A generates the key locker key data KL1. The keylocker key data KL1 is supplied to the encrypting circuit 41A. Theencrypting circuit 41A encrypts key locker information supplied from thekey locker generating circuit 34A with the key locker key data KL1supplied from the hash calculating circuit 36A.

[0099] Key locker data K_LOCK1 that has been generated by the key lockergenerating circuit 34A and encrypted by the encrypting circuit 41A isrecorded in the lead-in area LI2 of the optical disc 1.

[0100] The key locker generating circuit 34B encodes the content keydata KC1, KC2, . . . sent from the content key generating circuit 33 andthe copyright management information DRM1B, DRM2B, . . . sent from theDRM generating circuit 35B and generates key locker data. The key lockerdata generated by the key locker generating circuit 34B is supplied toan encrypting circuit 41B.

[0101] Key locker key data KL2 supplied from a hash calculating circuit36B is supplied to the encrypting circuit 41B. The encrypting circuit41B encrypts the key locker data supplied from the key locker generatingcircuit 34B with the key locker key data KL2 supplied from the hashcalculating circuit 36B. The key locker key data KL2 is generated byhash calculating the device key data KD and hidden code key data KH2.

[0102] In other words, the device key data KD is supplied to the hashcalculating circuit 36B. In addition, the hidden code key data KH2supplied from the hidden code key generating circuit 37B is supplied tothe hash calculating circuit 36B. The hidden code key data KH2 isgenerated as a random number by the hidden code key generating circuit37B. The hidden code key data KH2 is recorded in for example the programarea PA2 of the optical disc 1.

[0103] The hash calculating circuit 36B generates the key locker keydata KL2 with the device key data KD and the hidden code key data KH2generated by the hidden code key generating circuit 37B. The key lockerkey data KL2 is supplied to the encrypting circuit 41B. The encryptingcircuit 41B encrypts the key locker data supplied from the key lockergenerating circuit 34B with the key locker key data KL2 supplied fromthe hash calculating circuit 36B.

[0104] Key locker data K_LOCK2 that has been generated by the key lockergenerating circuit 34B and encrypted by the encrypting circuit 41B isrecorded in the program area PA2 of the optical disc 1.

[0105] A program generating circuit 40 generates application data for asoftware player SFT1 with which content data is decrypted. Theapplication data of the software player SFT1 is recorded in the programarea PA2 of the optical disc.

[0106] As described above, in the encrypting process of the optical disc1 according to the present invention, the individual content data C1,C2, . . . are encrypted with the content key data KC1, KC2, . . . ,respectively and recorded in the program area PA2 of the optical disc 1.The content key data KC1, KC2, . . . with which the individual contentdata C1, C2, . . . are encrypted are stored along with the copyrightmanagement information DRM1A, DRM2A, . . . in the key locker dataK_LOCK1 and recorded in the lead-in area LI2 of the optical disc 1. Inaddition, the content key data KC1, KC2, . . . with which the individualcontent data C1, C2, . . . are encrypted are stored along with thecopyright management information DRM1B, DRM2B, . . . in the key lockerdata K_LOCK2 and recorded in the program area PA2 of the optical disc 1.

[0107]FIG. 12 and FIG. 13 show a decrypting process for content data ofthe optical disc 1 according to the present invention. In the opticaldisc according to the present invention, the decrypting processperformed when the drive and player that can deal with the optical disc1 reproduces content data therefrom is different from the decryptingprocess performed when the drive and player that cannot deal with theoptical disc 1 reproduces content data therefrom. FIG. 12 shows adecrypting process performed when the drive or player that can deal withthe optical disc 1 reproduces content data therefrom. FIG. 13 shows adecrypting process performed when the drive or player that cannot dealwith the optical disc 1 reproduces content data therefrom.

[0108] In FIG. 12, encrypted content data C1 e, C2 e, . . . arereproduced from a program area PA2 of the optical disc 1. The encryptedcontent data C1 e, C2 e, . . . are supplied to decrypting circuits 43A,43B, 43C, . . . , respectively.

[0109] Key locker data K_LOCK1 and hidden code key data KH1 are readfrom a lead-in area LI2 of the optical disc 1. The key locker dataK_LOCK1 is supplied to a decrypting circuit 47.

[0110] The hidden code key data KH1 is read from the lead-in area LI2 ofthe optical disc 1. The hidden code key data KH1 is supplied to a hashcalculating circuit 42. Device key data KD is taken out from theapparatus or device that reproduces the optical disc 1. The device keydata KD is sent to the hash calculating circuit 42. The hash calculatingcircuit 42 generates key locker key data KL1 with the hidden code keydata KH1 and the device key data KD. The key locker key data KL1 is sentto a key locker reproducing circuit 48.

[0111] The decrypting circuit 47 decrypts key locker data K_LOCK1 withthe key locker key data KL1 supplied from the hash calculating circuit42. An output of the decrypting circuit 47 is supplied to the key lockerreproducing circuit 48.

[0112] The key locker reproducing circuit 48 takes out the content keydata KC1, KC2, . . . and copyright management information DRM1A, DRM2A,. . . from the key locker data K_LOCK1.

[0113] The content key data KC1, KC2, . . . taken out by the key lockerreproducing circuit 48 are supplied to decrypting circuits 43A, 43B, . .. , respectively. The copyright management information DRM1A, DRM2A, . .. taken out by the key locker reproducing circuit 48 are supplied to aDRM determining circuit 44.

[0114] The DRM determining circuit 44 determines reproductionrestrictions and copy restrictions of the individual content data C1,C2, . . . with the copyright management information DRM1A, DRM2A, . . .thereof, respectively. Information of the reproduction restrictions andcopy restrictions of the individual content data C1, C2, . . . aresupplied to a copy and reproduction controlling circuit 45.

[0115] The decrypting circuits 43A, 43B, . . . decrypt the encryptedcontent data C1 e, C2 e, C3 e. . . reproduced from the program area PA2of the optical disc 1 with the content key data KC1, KC2, . . . sentfrom the key locker reproducing circuit 48 and obtains the content dataC1, C2, . . . , respectively. The decrypted content data C1, C2, . . .are sent to the copy and reproduction controlling circuit 45. The copyand reproduction controlling circuit 45 performs reproductionrestrictions and copy restrictions for the individual content data C1,C2, . . . with the information of the reproduction restrictions and copyrestrictions supplied from the DRM determining circuit 44.

[0116] As described above, in the decrypting process of the drive andplayer that can deal with the optical disc 1, the key locker dataK_LOCK1 is read from the lead-in area LI2 of the optical disc 1. The keylocker reproducing circuit 48 takes out the content key data KC1, KC2, .. . and the copyright management information DRM1A, DRM2A, . . . fromthe key locker data K_LOCK1. The encrypted content data C1 e, C2 e, . .. reproduced from the program area PA2 of the optical disc 1 are sent tothe decrypting circuits 43A, 43B, . . . , respectively. The encryptedcontent data C1 e, C2 e, . . . are decrypted with the content key dataKC1, KC2, . . . taken out from the key locker data K_LOCK1 of thelead-in area LI2. As a result, the content data C1, C2, . . . areobtained. The key locker reproducing circuit 48 obtains the copyrightmanagement information DRM1A, DRM2A, . . . and controls thereproductions and copies of the individual content data C1, C2, . . .with the copyright management information DRM1A, DRM2A, . . . ,respectively.

[0117]FIG. 13 shows a decrypting process of the conventional player anddriver that cannot deal with the optical disc 1.

[0118] In FIG. 13, an application of a software player SFT1 is read froma program area PA2 of the optical disc 1. Application data of thesoftware player SFT1 is sent to a software program executing circuit 60.With the application data of the software player SFT1, a decryptingprocess can be executed by software. The application of the softwareplayer SFT1 may not be the main body of the application that executesthe decrypting process, but a part thereof.

[0119] Key locker data K_LOCK2 and hidden code key data KH2 are readfrom the program area PA2. The key locker key data K_LOCK2 is suppliedto a decrypting circuit 57.

[0120] The hidden code key data KH2 is sent to a hash calculatingcircuit 52. Device key data KD is taken out from the device. The devicekey data KD is sent to the hash calculating circuit 52. The hashcalculating circuit 52 generates key locker key data KL2 with the hiddencode key data KH2 and the device key data KD. The key locker key dataKL2 is sent to the decrypting circuit 57.

[0121] The decrypting circuit 57 decrypts data of the key locker dataK_LOCK2 with the key locker key data KL2 supplied from the hashcalculating circuit 52. The key locker data K_LOCK2 decrypted by thedecrypting circuit 57 is supplied to a key locker reproducing circuit51.

[0122] The key locker reproducing circuit 51 takes out content key dataKC1, KC2, . . . and copyright management information DRM1B, DRM2B, . . .from the key locker data K_LOCK2. The content key data KC1, KC2, . . .taken out by the key locker reproducing circuit 51 are supplied todecrypting circuits 53A, 53B, 53C, . . . , respectively. The copyrightmanagement information DRM1B, DRM2B, . . . taken out by the key lockerreproducing circuit 51 are sent to a DRM determining circuit 54.

[0123] The DRM determining circuit 54 determines reproductionrestrictions and copy restrictions of the individual content data C1,C2, . . . with the copyright management information DRM1B, DRM2B, . . ., respectively. The information of the reproduction restrictions andcopy restrictions of the individual content data C1, C2, . . . is sentto a copy and reproduction controlling circuit 55.

[0124] The decrypting circuits 53A, 53B, 53C, . . . decrypt theencrypted content data C1 e, C2 e, C3 e, . . . reproduced from theprogram area PA2 of the optical disc 1 and obtains the decrypted contentdata C1, C2, . . . , respectively. The decrypted content data C1, C2, .. . are sent to the copy and reproduction controlling circuit 55. Thecopy and reproduction controlling circuit 55 performs the reproductionrestrictions and copy restrictions of the content data C1, C2, . . .with the information of the reproduction restrictions and copyrestrictions supplied from the DRM determining circuit 54.

[0125] In the decrypting process of the drive and player that cannotdeal with the optical disc 1, the key locker data K_LOCK2 is read fromthe program area PA2 of the optical disc 1. The key locker reproducingcircuit 51 takes out the content key data KC1, KC2, . . . and thecopyright management information DRM1B, DRM2B, . . . from the key lockerdata K_LOCK2. The encrypted content data C1 e, C2 e, . . . reproducedfrom the program area PA2 of the optical disc 1 are sent to thedecrypting circuits 43A, 43B, . . . , respectively. The encryptedcontent data C1 e, C2 e, . . . are decrypted with the content key dataKC1, KC2, . . . taken out from the key locker data K_LOCK2 of theprogram area PA2, respectively. As a result, the decrypted content dataC1, C2, . . . are obtained. The copyright management information DRM1B,DRM2B, . . . are taken out by the key locker reproducing circuit 51.With the copyright management information DRM1B, DRM2B, . . . , thereproductions and copies of the individual content data C1, C2, . . .are controlled.

[0126] As shown in FIG. 11A and FIG. 11B, in the encrypting process forthe optical disc 1 according to the present invention, the selectors 38Aand 38B are provided. The selectors 38A and 38B select desired contentkey data KC1, KC2, . . . from the content key data KC1, KC2, . . .supplied to the key locker generating circuits 34A and 34B and containthe selected content key data in the key locker data K_LOCK1 andK_LOCK2. The DRM generating circuit 35A, which generates the copyrightmanagement information DRM1A, DRM2A, . . . contained in the key lockerdata K_LOCK1 recorded in the lead-in area LI2, and the DRM generatingcircuit 35B, which generates the copyright management information DRM1B,DRM2B, . . . contained in the key locker data K_LOCK2 recorded in theprogram area PA2, are separately disposed. The selectors 39A and 39Bselect desired copyright management information from the copyrightmanagement information DRM1A, DRM2A, . . . and DRM1B, DRM2B, . . .supplied to the key locker generating circuits 34A and 34B,respectively.

[0127] Thus, the content key data KC1, KC2, . . . and the copyrightmanagement information DRM1A, DRM2A, . . . contained in the key lockerdata K_LOCK1 recorded in the lead-in area LI2 and the content key dataKC1, KC2, . . . and the copyright management information DRM1B, DRM2B, .. . contained in the key locker data K_LOCK2 recorded in the programarea PA2 can be separately designated.

[0128] In such a structure, when contents of the key locker data K_LOCK1recorded in the lead-in area LI2 and the contents of the key locker dataK_LOCK2 recorded in the program area PA2 are separately designated,content data reproduced by the player and drive that can deal with theoptical disc 1 and content data reproduced by the drive and player thatcannot deal with the optical disc 1 can be distinguished in the numberof pieces of reproducible content data, titles, reproduction conditions,and copy conditions.

[0129] In other words, it is supposed that the key locker data K_LOCK1recorded in the lead-in area LI2 can be read by only the player anddrive that can deal with the optical disc 1. Thus, since the secrecy ishigh, the possibility of which content data is illegally reproduced andcopied is low. In contrast, the key locker data K_LOCK2 recorded in theprogram area PA2 is read by the conventional player and drive. Thus,since the secrecy is low, the possibility of which content data isillegally reproduced and copied is high.

[0130] Thus, it is considered that with the key locker data K_LOCK1,which is recorded in the high secrecy lead-in area LI2, the number ofreproducible contents can be increased, the qualities of reproduciblecontents are higher or management restrictions with respect to copyrightmanagement are more advantageous such as more added values withadditional information than with the key locker data K_LOCK2 recorded inthe low secrecy program area PA2. As a result, with additionalinformation, added values can be increased.

[0131] For example, as shown in FIG. 14, it is assumed that content dataC1, C2, C3, C4, C5, . . . have been recorded in a program area PA2 ofthe optical disc 1. In key locker data K_LOCK1 in a high secrecy lead-inarea LI2, content key data KC1, KC2, KC3, KC4, and KC5 of the contentdata C1, C2, C3, C4, C5, . . . are recorded. In addition, copyrightmanagement information DRM1A, DRM2A, DRM3A, DRM4A, DRM5A, . . . arerecorded.

[0132] In contrast, in key locker data K_LOCK2 in a low secrecy programarea PA2, content key data KC1, KC2, KC3, . . . and copyright managementinformation DRM1B, DRM2B, DRM3B, . . . of the content data C1, C2, C3, .. . are recorded.

[0133] In that case, when the key locker data K_LOCK1 in the lead-inarea LI2 is used, all the content data C1, C2, C3, C4, C5, . . . can bedecrypted and reproduced. In contrast, when the key locker data K_LOCK2in the program area PA2 is used, since there are not the content keydata KC4 and KC5 with which the content data C4 and C5 are decrypted,only three content data C1, C2, C3, . . . can be reproduced.

[0134] Thus, although the new type player and drive that can deal withthe optical disc 1 can reproduce the content data C1, C2, C3, C4, C5, .. . , the drive and player that cannot deal with the optical disc 1 canreproduce only the content data C1, C2, C3, . . . .

[0135] In that example, with the key locker data K_LOCK1 in the highsecrecy lead-in area LI, the number of pieces of reproducible contentdata thus added values are larger than that with the key locker dataK_LOCK2 in the low secrecy program area PA2.

[0136] For example, as shown in FIG. 15, in key locker data K_LOCK1 in ahigh secrecy lead-in area LI2, content key data KC1, KC2, KC3, KC4, andKC5 and copyright management information DRM1, DRM2, DRM3, DRM4, DRM5, .. . of content data C1, C2, C3, C4, C5, . . . have been recorded. Allthe copyright management information DRM1A, DRM2A, DRM3A, DRM4A, DRM5A,. . . represent copy permissions.

[0137] In contrast, in key locker data K_LOCK2 in a low secrecy programarea PA2, content key data KC1, KC2, . . . KC3, KC4, and KC5 andcopyright management information DRM1B, DRM2B, DRM3B, DRM4B, DRM5B, . .. of content data C1, C2, C3, C4, C5, . . . have been recorded. All thecopyright management information DRM1B, DRM2B, DRM3B, DRM4B, DRM5B, . .. represent copy prohibitions.

[0138] In that case, when the key locker data K_LOCK1 in the lead-inarea LI2 is used, all the recorded content data C1, C2, C3, C4, C5, . .. can be copied. However, when the key locker data K_LOCK2 in theprogram area PA2 is used, all the content data C1, C2, C3, C4, C5, . . .cannot be copied.

[0139] Thus, although the new type player and drive, which can deal withthe optical disc 1, can copy the content data C1, C2, C3, C4, C5, . . ., the conventional drive and player, which cannot deal with the opticaldisc 1 can reproduce the content data C1, C2, C3, C4, C5, . . . , butthey cannot not copy them.

[0140] In that example, with the key locker data in the high secrecylead-in area, the management restrictions with respect to the copyrightmanagement are more advantageous and added values becomes higher thanthose with the key locker data in the low secrecy program area.

[0141] Thus, when the key locker data K_LOCK1 and K_LOCK2 are recordedin the lead-in area LI2 and the program area PA2, respectively, with thekey locker data K_LOCK1 in the high secrecy lead-in area LI2, the numberof pieces of reproducible content data is larger, the copyrightmanagement is more advantageous, and added values are larger than withthe key locker data K_LOCK2 in the program area PA2.

[0142] It is supposed that the key locker data K_LOCK1 and K_LOCK2recorded in the high secrecy lead-in area LI2 and low secrecy programarea PA2 have the following structures.

[0143] In the key locker data K_LOCK1 recorded in the lead-in areaand/or the lead-out area, which is a high secrecy recording position,the number of pieces of copyright management information is lower thanin the key locker data K_LOCK2 in the program area, which is a lowsecrecy recording position. As a result, with the copyright managementinformation recorded in the lead-in area and/or the lead-out area, thenumber of reproducible music programs is larger than with the copyrightmanagement information recorded in the program area.

[0144] In the key locker data K_LOCK1 recorded in the lead-in areaand/or the lead-out area, which is a high secrecy recording position,the management restrictions of copyright management information arelooser than in the key locker data K_LOCK2 recorded in the program area,which is a low secrecy recording position. For example, when thecopyright management information of the key locker recorded in thelead-in area and/or the lead-out area represents copy permissions, thecopyright management information of the program area may represent copyprohibitions. Likewise, when the copyright management information of thekey locker data recorded in the lead-in area and/or the lead-out arearepresents multi-generation copy permissions, the copyright managementinformation of the program area may represent one-generation copypermissions.

[0145] Copyright management information of the key locker data K_LOCK1recorded in the lead-in area and/or the lead-out area, which is a highsecrecy recording position, may represent higher quality content dataand more added values with additional information than copyrightmanagement information of the key locker data K_LOCK2 in the programarea, which is a low secrecy position. For example, while copyrightmanagement information of the key locker data K_LOCK1 in the lead-inarea and/or the lead-out area represents reproduction permission of allmusic programs, copyright management information of the key locker dataK_LOCK2 in the program area may represent reproduction permissions ofonly feature portions or narrations of music programs. In such a manner,content qualities are distinguished. Alternatively, copyright managementinformation of the key locker data K_LOCK1 recorded in the lead-in areaand/or the lead-out area may contain music programs and promotion stillpictures and moving pictures thereof. In contrast, copyright managementinformation of the key locker data K_LOCK2 in the program area maycontain only music programs, omitting their promotion still pictures andmoving pictures. In such a manner, the copyright management informationof the key locker data K_LOCK1 and the copyright management informationof the key locker data K_LOCK2 are distinguished.

[0146] The number of pieces of content key data of the key locker dataK_LOCK1 recorded in the lead-in area and/or the lead-out area, which isa high secrecy recording position, is smaller than that of the keylocker data K_LOCK2 of the program area, which is a low secrecyrecording position. Thus, the number of music programs reproduced withthe content key data of the key locker recorded in the key locker dataK_LOCK1 recorded in the lead-in area and/or the lead-out area is largerthan that with the content key data of the key locker data K_LOCK2recorded in the program area.

[0147] With the content key data of the key locker data K_LOCK1 recordedin the lead-in area and/or the lead-out area, which is a high secrecyrecording position, higher quality contents can be reproduced and moreadded values can be obtained with additional information than thecontent key data of the key locker data K_LOCK2 in the program area,which is a low secrecy recording position. For example, with the contentkey data of the key locker data K_LOCK1 recorded in the lead-in areaand/or the lead-out area, which is a high secrecy recording position,all music programs can be reproduced. In contrast, with the content keydata of the key locker data K_LOCK2 recorded in the program area, onlyfeature portions and narrations of music programs can be reproduced. Insuch a manner, qualities of content data to be reproduced aredistinguished. Alternatively, the content key data of the key lockerdata K_LOCK1 recorded in the lead-in area and/or the lead-out area iskey data for music programs and promotion still pictures and movingpictures thereof. In contrast, the content key data of the key lockerdata K_LOCK2 recording in the program area contain is key data for onlymusic programs, omitting promotion still pictures and moving pictures.In such a manner, they are distinguished.

[0148] Thus, the new type player and drive, which can deal with theoptical disc according to the present invention and the conventionaldrive and player, which cannot deal with the optical disc according tothe present invention can be distinguished in the number of reproduciblecontents, the qualities thereof, and added values thereof. In addition,the copyright of the content data can be protected.

[0149] Next, a real structure of a recording apparatus will bedescribed. In FIG. 16A and 16B, content data to be recorded in a programarea PA1 is supplied to an input terminal 100. The content data is audiodata that is the same as data corresponding to CD-DA standard. Thecontent data supplied from the input terminal 100 is supplied to anerror correction code encoding circuit 104.

[0150] Content data to be recorded in a program area PA2 is supplied toan input terminal 101. The content data is audio data compressedcorresponding to a compressing system for example ATRAC3. The contentdata is supplied to an encrypting circuit 102.

[0151] The encrypting circuit 102 encrypts each piece of content data.Content key data KC1, KC2, . . . are supplied from a content keygenerating circuit 103 to the encrypting circuit 102. The content keygenerating circuit 103 generates the content key data KC1, KC2, . . . ofthe individual contents. The content data supplied from the inputterminal 101 is encrypted with the content key data KC1, KC2, . . .supplied from the content key generating circuit 103. An output of theencrypting circuit 102 is supplied to the error correction code encodingcircuit 104.

[0152] The content key data KC1, KC2, . . . generated by the content keygenerating circuit 103 are supplied to a key locker generating circuit105A. In addition, the content key data KC1, KC2, . . . are supplied toa key locker generating circuit 105B. Copyright management informationDRM1A, DRM2A, . . . and DRM1B, DRM2B, . . . are supplied from DRMgenerating circuits 106A and 106B to the key locker generating circuits105A and 105B, respectively.

[0153] The DRM generating circuit 106A generates the copyrightmanagement information DRM1A, DRM2A, . . . to be contained in the keylocker data K_LOCK1 recorded in the lead-in area LI2. The DRM generatingcircuit 106B generates the copyright management information DRM1B,DRM2B, . . . to be contained in the key locker data K_LOCK2 recorded inthe program area PA2.

[0154] The key locker generating circuit 105A generates the key lockerdata K_LOCK1 recorded in the lead-in area LI2. The key locker dataK_LOCK1 recorded in the lead-in area LI2 is supplied to an encryptingcircuit 108A. Key locker key data KL1 is supplied from a hashcalculating circuit 110A to the encrypting circuit 108A. The key lockerkey data KL1 is generated by a hash calculating circuit 119A. The hashcalculating circuit 119A hash-calculates hidden key data KH1 suppliedfrom a hidden key generating circuit 109A and the device key data KD.The encrypting circuit 108A encrypts the key locker data K_LOCK1. Thekey locker data K_LOCK1 encrypted by the encrypting circuit 108A issupplied to a TOC (Table Of Contents) sub code generating circuit 112.The hidden code key data KH1 supplied from the hidden key generatingcircuit 109A is supplied to the TOC sub code generating circuit 112.

[0155] The key locker generating circuit 105B generates the key lockerdata K_LOCK2 recorded in the program area PA2. Data of the key lockerdata K_LOCK2 recorded in the program area LI2 is supplied to theencrypting circuit 108B. The key locker key data KL2 is supplied from ahash calculating circuit 110B to the encrypting circuit 108B. The keylocker key data KL2 is generated by a hash calculating circuit 119B. Thehash calculating circuit 119B hash calculates the hidden key data KH2supplied from a hidden key generating circuit 109B and device key dataKD. The encrypting circuit 108B encrypts the key locker data K_LOCK2.The key locker data K_LOCK2 encrypted by the encrypting circuit 108B issupplied to the error correction code encoding circuit 104.

[0156] The hidden key data KH2 supplied from the hidden key generatingcircuit 109B is supplied to the error correction code encoding circuit104. Application data of a software player SFT1 supplied from a softwareplayer generating circuit 118 is supplied to the error correction codeencoding circuit 104.

[0157] The error correction code encoding circuit 104 performs an errorcorrection code encoding process for content data with CIRC (CrossInterleave Reed-Solomon Code). An output of the error correction codeencoding circuit 104 is supplied to a TOC sub code adding circuit 113.The TOC sub code adding circuit 113 adds TOC data and sub code data tothe output of the error correction code encoding circuit 104.

[0158] An output of the TOC sub code adding circuit 113 is supplied to amodulating circuit 117. The modulating circuit 117 performs for exampleEFM (8 to 14 Modulation).

[0159] The optical disc 1 is placed on a turn table (not shown) androtated by a spindle motor 120. The spindle motor 120 is driven by aspindle controlling circuit 123 under the control of a servo controllingcircuit 125 so that the spindle motor 120 rotates at constant linearvelocity (CLV) or constant angular velocity (CAV).

[0160] The servo controlling circuit 125 generates various servo drivesignals of focus servo drive signal, tracking servo drive signal, threadservo drive signal, and spindle servo drive signal corresponding to afocus error signal, a tracking error signal, and an operation commandissued from a system controller 130 and outputs the generated servodrive signals to an actuator controlling circuit 126 126, a threadcontrolling circuit 127, and the spindle controlling circuit 123.

[0161] An optical pickup 121 is a mechanism that condenses laser lightof a semiconductor laser as a light source on a signal surface of theoptical disc 1 and scans tracks concentrically or spirally formed on theoptical disc 1. An objective lens that condenses the laser light of theoptical pickup 121 on the signal surface of the optical disc 1 can betraveled in a focus direction and a tracking direction by an actuator(not shown). The actuator is controlled by an actuator controllingcircuit 126 under the control of the servo controlling circuit 125. Allthe optical pickup 121 is traveled in the radius direction of theoptical disc 1 by a thread mechanism 122. The traveling of the threadmechanism 122 is controlled by the thread controlling circuit 127 underthe control of the servo controlling circuit 125.

[0162] Output data of the modulating circuit 117 is supplied to theoptical pickup 121. The optical pickup 121 outputs laser light whoselighting wavelength has been modulated corresponding to the output dataof the modulating circuit 117. The laser light lights the recordingsurface of the optical disc 1. As a result, information is recorded onthe optical disc 1.

[0163] In the recording apparatus, when content data is recorded in theprogram area PA1, the content data supplied from the input terminal 100is supplied to the error correction code encoding circuit 104. The errorcorrection code encoding circuit 104 performs the error correction codeencoding process for the content data.

[0164] The optical pickup 121 is traveled to the program area PA1. Anoutput of the error correction code encoding circuit 104 is supplied tothe modulating circuit 117. The content data supplied from the inputterminal 100 is recorded in the program area PA1.

[0165] When content data is recorded in the program area PA2, thecontent data supplied from the input terminal 101 is encrypted by theencrypting circuit 102 and supplied to the error correction codeencoding circuit 104. The error correction code encoding circuit 104performs the error correction code encoding process for the contentdata.

[0166] The key locker generating circuit 105A generates the key lockerdata K_LOCK1 recorded in the lead-in area LI2. The key locker generatingcircuit 105B generates the key locker data K_LOCK2 recorded in theprogram area PA2.

[0167] The optical pickup 111 is traveled to the lead-in area LI2. Thekey locker data K_LOCK1 supplied from the key locker generating circuit105A and recorded in the lead-in area LI2 is supplied to the TOC subcode generating circuit 112. The key locker data K_LOCK1 is recorded inthe lead-in area LI2 of the optical disc 1.

[0168] The optical pickup 111 is traveled to the lead-in area LI2. Thekey locker data K_LOCK2 supplied from the key locker generating circuit105B and recorded in the lead-in area LI2 is supplied to the errorcorrection code encoding circuit 104. An output of the error correctioncode encoding circuit 104 is supplied to the modulating circuit 107. Thekey locker data K_LOCK2 is recorded in the program area PA2. Applicationdata of a software player SFT1 supplied from a software playergenerating circuit 118 is sent to the error correction code encodingcircuit 104. The application data of the software player SFT1 isrecorded in the program area PA2.

[0169]FIG. 17 shows a real structure of a reproducing apparatus that candeal with the optical disc 1 in the case that the reproducing apparatusreproduces data from the optical disc 1 according to the presentinvention.

[0170] In FIG. 17, the optical disc 1 is placed on a turn table (notshown) and rotated by a spindle motor 150. The spindle motor 150 isdriven by a spindle controlling circuit 152 under the control of a servocontrolling circuit 151 so that the spindle motor 150 rotates atconstant linear velocity (CLV) or constant angular velocity (CAV).

[0171] The servo controlling circuit 151 generates various servo drivesignals of focus servo drive signal, tracking servo drive signal, threadservo drive signal, and spindle servo drive signal corresponding to afocus error signal, a tracking error signal, and an operation commandissued from a system controller 160 and outputs those signals to anactuator controlling circuit 153, a thread controlling circuit 154, andthe spindle controlling circuit 152. An optical pickup 155 is amechanism condenses laser light of a semiconductor laser as a lightsource on a signal surface of the optical disc 1 with an objective lensand scans tracks concentrically or spirally formed on the optical disc1. All the optical pickup 155 is traveled in the radius direction of theoptical disc 1 by a thread mechanism 156.

[0172] When the program area PA1 is reproduced, the optical pickup 155is traveled to the program area PA1 of the optical disc 1 by the threadmechanism 156. The optical pickup 155 reads data from the program areaPA1 of the optical disc 1. Content data in the same format as datacorresponding to for example CD-DA standard is read from the programarea PA1. An output signal of the optical pickup 155 is supplied to anerror correction code decoding circuit 162 through an RF amplifier 157,an EFM demodulating circuit 161, and a TOC sub code extracting circuit158. The error correction code decoding circuit 162 performs an errorcorrecting process for the output signal of the optical pickup 155. Anoutput of the error correction code decoding-circuit 162 is output froman output terminal 168.

[0173] When the program area PA2 is reproduced, the optical pickup 155is traveled to the lead-in area LI2 by the thread mechanism 156. Keylocker data K_LOCK1 is read from a lead-in area LI2. The key locker dataK_LOCK1 is supplied from the TOC sub code extracting circuit 158 to adecrypting circuit 166. Hidden key data KH1 is read from the lead-inarea LI2. The hidden key data KH1 is supplied from the TOC sub codeextracting circuit 158 to a key locker key generating circuit 167. Thekey locker key generating circuit 167 generates key locker key data KL1with device key data KD stored in the reproducing apparatus and thehidden key data KH1. The key locker key data KL1 is supplied to thedecrypting circuit 166.

[0174] The decrypting circuit 166 decrypts the key locker data K_LOCK1with the key locker key data KL1 supplied from the hash calculatingcircuit 167. An output of the decrypting circuit 166 is supplied to akey locker reproducing circuit 164. The key locker reproducing circuit164 takes out content key data KC1, KC2, . . . from the reproduced keylocker data K_LOCK1. The content key data KC1, KC2, . . . are suppliedto a decrypting circuit 165.

[0175] The optical pickup 155 is traveled to the program area PA2 by thethread mechanism 156. Content data is read from the program area PA2.The content data in the program area PA2 has been compressedcorresponding to for example ATRAC3 and encrypted. An output signal ofthe optical pickup 155 is supplied to the decrypting circuit 165 throughthe RF amplifier 157, the demodulating circuit 161, the TOC sub codeextracting circuit 158, and the error correction code decoding circuit162.

[0176] The content key data Kc1, KC2, . . . are supplied from the keylocker reproducing circuit 164 to the decrypting circuit 165. Thedecrypting circuit 165 decrypts the content data with the content keydata KC1, KC2, . . . supplied from the key locker reproducing circuit164. The decrypted content data is output from an output terminal 169.

[0177] The key locker reproducing circuit 164 takes out copyrightmanagement information DRM1A, DRM2A, . . . from the key locker dataK_LOCK1. The copyright management information DRM1A, DRM2A, . . . aresupplied to the system controller 160. The system controller 160determines the copyright management information DRM1A, DRM2A, . . . Thesystem controller 160 performs reproduction restrictions and copyrestrictions corresponding to the copyright management informationDRM1A, DRM2A, . . .

[0178]FIG. 18 shows a real structure of a reproducing apparatus thatcannot deal with the optical disc 1 in the case that the reproducingapparatus reproduces data from the optical disc 1 according to thepresent invention.

[0179] In FIG. 18, the optical disc 1 is placed on a turn table (notshown) and rotated by a spindle motor 170. The spindle motor 170 isdriven by a spindle controlling circuit 172 under the control of a servocontrolling circuit 171 so that the spindle motor 170 rotates atconstant linear velocity (CLV) or constant angular velocity (CAV).

[0180] The servo controlling circuit 171 generates various servo drivesignals of focus servo drive signal, tracking drive signal, thread drivesignal, and spindle drive signal corresponding to a focus error signal,a tracking error signal, and an operation command issued from a systemcontroller 180 and outputs those signals to an actuator controllingcircuit 173, a thread controlling circuit 174, and the spindlecontrolling circuit 172. An optical pickup 175 is a mechanism thatcondenses laser light of a semiconductor laser as a light source on asignal surface of the optical disc 1 with an objective lens and scanstracks concentrically or spirally formed on the optical disc 1. All theoptical pickup 175 is traveled in the radius direction of the opticaldisc 1 by a thread mechanism 176.

[0181] An output signal of the optical pickup 175 is supplied to ademodulating circuit 181 through an RF amplifier 177. The demodulatingcircuit 181 EFM-demodulates the output signal of the optical pickup 175.Output data of the demodulating circuit 181 is supplied to an errorcorrection code decoding circuit 182. The error correction code decodingcircuit 182 performs an CIRC error correcting process.

[0182] When a program area PA1 is reproduced, the optical pickup 175 istraveled to the program area PA1 of the optical disc 1 by the threadmechanism 176. The optical pickup 175 reads data from the program areaPA1 of the optical disc 1. Content data that has the same format as datacorresponding to CD-DA standard is read from the program area PA1. Anoutput signal of the optical pickup 175 is demodulated by thedemodulating circuit 181. The demodulated signal is sent to a TOC subcode extracting circuit 184 and the error correction code demodulatingcircuit 182. The error correction code decoding circuit 182 performs anerror correcting process. Output data of the error correction codedecoding circuit 182 is output through an interface 183.

[0183] When content data is reproduced from the program area PA2, adecrypting process is performed by software 191 of a personal computer190.

[0184] In other words, when the program area PA2 is reproduced, theoptical pickup 175 is traveled to the program area PA2. Data of thesoftware player SFT1 is read. The data of the software player SFT1 issupplied to the personal computer 190 through the demodulating circuit181, the TOC sub code extracting circuit 184, the error correction codedecoding circuit 182, and the interface 183.

[0185] As shown in FIG. 19, when the application of the software playeris started (at step S1), hidden key data KH2 is read from the programarea PA2 (at step S2). The hidden key data KH2 and device key data KDare calculated. As a result, key locker key data KL2 is generated (atstep S3).

[0186] Key locker data K_LOCK2 is read from the program area PA2 (atstep S4). Data of the key locker data K_LOCK2 that has been read isdecrypted with the key locker key data KL2 generated at step S3. Contentkey data KC1, KC2, . . . and copyright management information DRM1B,DRM2B, . . . are taken out from the key locker data K_LOCK2 (at stepS5).

[0187] It is determined whether or not a reproduction command has beenissued (at step S6). When the reproduction command has been issued, itis determined whether or not content key data KC1, KC2, . . . with whichcontent data corresponding to the reproduction command is decrypted arecontained in content key data KC1, KC2, . . . of the key locker dataK_LOCK2 taken out at step S5 (at step S7).

[0188] When it has been determined at step S7 that the content key dataKC1, KC2, . . . with which the content data corresponding to thereproduction command is decrypted are contained, the flow advances tostep S8. It is determined whether or not the content data correspondingto the reproduction command can be reproduced with the copyrightmanagement information DRM1B, DRM2B, . . . of the key locker dataK_LOCK2 taken out at step S5 (at step S8).

[0189] When it has been determined at step S7 that the content key dataKC1, KC2, . . . with which the content data corresponding to thereproduction command is decrypted are not contained, the reproducingoperation is stopped (at step S8).

[0190] When it has been determined at step S8 that the content datacorresponding to the reproduction command can be reproduced with thecopyright management information DRM1B, DRM2B, . . . , the opticalpickup 175 reads the content data from the program area PA2 (at stepS9). With the content key data KC1, KC2, . . . taken out from the keylocker data K_LOCK2 at step S5, the content data is decrypted (at stepS10).

[0191] When it has been determined at step S8 that the content datacorresponding to the reproduction command can be reproducedcorresponding to the copyright management information DRM1B, DRM2B, . .. the reproducing operation is stopped (at step S8).

[0192] As shown in FIG. 17, when the drive and player that can deal withthe optical disc 1 according to the present invention reproduce contentdata therefrom, the content data is decrypted with the content key dataKC1, KC2, . . . stored in the key locker data K_LOCK1 in the lead-inarea LI2. With the copyright management information DRM1A, DRM2A, . . .stored in the key locker data K_LOCK1 in the lead-in area LI2, thereproduction and copy of the content data are controlled.

[0193] In contrast, as shown in FIG. 18 and FIG. 19, when theconventional drive and player that cannot deal with the optical disc 1reproduce content data therefrom, with the content key data KC1, KC2, .. . stored in the key locker data K_LOCK2 in the program area PA2, thecontent data is decrypted. With the copyright management informationDRM1B, DRM2B, . . . stored in the key locker data K_LOCK2 in the programarea PA2, the reproduction and copy of the content data are controlled.

[0194] As shown in FIG. 14 and FIG. 15, the number of content key dataKC1, KC2, . . . of the key locker data K_LOCK1 in the high secrecylead-in area LI2 is larger than the number of content key data KC1, KC2,. . . of the key locker data K_LOCK2 in the low secrecy program areaPA2. In addition, the management conditions of the copyright managementinformation DRM1A, DRM2A, . . . of the key locker data K_LOCK1 in thehigh secrecy lead-in area LI2 are more advantageous than the managementconditions of the copyright management information DRM1B, DRM2B, . . .of the key locker data K_LOCK2 in the low secrecy program area PA2. Inthat case, the drive and player that can deal with the optical disc 1can reproduce more music programs and have more added values than theconventional drive that cannot deal with the optical disc 1.

[0195] In the forgoing example, the optical disc is a two-session discof which a conventional content data recording area is separated fromencrypted content data recording area. Alternatively, the optical discmay be a one-session disc.

[0196] In addition, in the forgoing example, key locker data and hiddenkey data are recorded in a lead-in area and a program area.Alternatively, key locker data and hidden key data may be recorded in alead-out area and a program area. Alternatively, key locker data andhidden key data may be recorded in a lead-in area, a lead-out area, aprogram area.

[0197] According to the present invention, the player and drive that candeal with the new type optical disc access a key locker recorded in thelead-in area and/or the lead-out area, obtain copyright managementinformation and content key data, and reproduce content data. The playerand drive that cannot deal with the new type optical disc access a keylocker in the program area, obtain copyright management information andcontent key data, and reproduce content data.

[0198] A key locker recorded in the lead-in area and/or the lead-outarea can be accessed by only the reproducing apparatus that can dealwith the new type optical disc. A key locker in the program area can beaccessed by the reproducing apparatus that cannot deal with the new typeoptical disc. Since the reproducing apparatus that can deal with the newtype optical disc uses a key locker recorded in the lead-in area and/orthe lead-out area, the secrecy is high. In contrast, since thereproducing apparatus that cannot deal with the new type optical discuses a key locker recorded in the program area, the secrecy is notsecured.

[0199] According to the present invention, the copyright managementinformation and the content key data of the key locker recorded in theprogram area are smaller than those of the key locker recorded in thelead-in area and/or the lead-out area with respect to quantity and addedvalues, the copyright can be protected. In addition, since the number ofreproducible contents and qualities thereof reproduced by thereproducing apparatus that can deal with the new type optical disc aredifferent from those reproduced by the reproducing apparatus that cannotdeal with the new type optical disc, they can be distinguished. Thus,sales of the new type apparatus can be promoted. Industrial Utilization

[0200] As described above, the present invention is suitable for arecording medium such as an optical disc for recording content data, arecording method and apparatus for recording content data on such arecording medium, and a reproducing method for reproducing content data.

1. A recording medium, comprising: a lead-in area; a data recording areathat is formed on an outer periphery side of the lead-in area and inwhich a plurality of pieces of content data is recorded; and a lead-outarea formed on an outer periphery side of the data recording area,wherein first copyright management information and second copyrightmanagement information with which copyrights of the plurality of piecesof content data are managed are recorded at different positions whosesecrecies are different from each other.
 2. The recording medium as setforth in claim 1, wherein any one of the first copyright managementinformation and the second copyright management information is recordedin any one of the lead-in area and the lead-out area, the othercopyright management information being recorded in the data recordingarea.
 3. The recording medium as set forth in claim 1, wherein the firstcopyright management information and the second copyright managementinformation are copyright management information that are different fromeach other in management conditions under which the plurality of piecesof content data are reproduced.
 4. The recording medium as set forth inclaim 3, wherein any one of the first copyright management informationand the second copyright management information is managementinformation that represents reproduction permissions of the plurality ofpieces of content data, whereas the other copyright managementinformation is management information that represents partialreproduction permissions of the plurality of pieces of content data. 5.The recording medium as set forth in claim 4, wherein one of the firstcopyright management information and the second copyright managementinformation is recorded in at least any one of the lead-in area and thelead-out area.
 6. The recording medium as set forth in claim 5, whereinthe other copyright management information of the first copyrightmanagement information and the second copyright management informationis recorded in the data area.
 7. The recording medium as set forth inclaim 1, wherein any one of the first copyright management informationand the second copyright management information is stricter inmanagement conditions of the plurality of pieces of content data thanthe other copyright management information.
 8. The recording medium asset forth in claim 7, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin reproduction restriction conditions of the plurality of pieces ofcontent data than the other copyright management information.
 9. Therecording medium as set forth in claim 8, wherein any one of the firstcopyright management information and the second copyright managementinformation contains copy prohibition conditions of the plurality ofpieces of content data, whereas other copyright management informationcontains copy permission conditions of the plurality of pieces ofcontent data.
 10. The recording medium as set forth in claim 9, whereinthe other copyright management information, which contains copypermission conditions of the plurality of pieces of content data, isrecorded in at least any one of the lead-in area and the lead-out area.11. The recording medium as set forth in claim 9, wherein one of thefirst copyright management information and the second copyrightmanagement information, which contains copy prohibition conditions ofthe plurality of pieces of content data, is recorded in the datarecording area.
 12. The recording medium as set forth in claim 1,wherein at least one of the plurality of pieces of content data recordedin the data recording area has been encrypted and recorded, and whereinthe first copyright management information and the second copyrightmanagement information are recorded along with key data with which theencrypted piece of content data is decrypted.
 13. The recording mediumas set forth in claim 12, wherein the first copyright managementinformation and the second copyright management information areencrypted and recorded along with the key data with which the encryptedpiece of content data is decrypted.
 14. A recording method, comprisingthe steps of: recording a plurality of pieces of content data to arecording medium; and recording first copyright management informationand second copyright management information with which copyrights of theplurality of pieces of content data are managed at different positionsof the recording medium, secrecies of the different positions beingdifferent from each other.
 15. The recording method as set forth inclaim 14, wherein one of the first copyright management information andthe second copyright management information is recorded in at least anyone of a lead-in area that is formed on an inner periphery side of arecording area in which the plurality of pieces of content data arerecorded and a lead-out area that is formed on an outer periphery sideof the recording area, and wherein the other copyright managementinformation is recorded in the recording area.
 16. The recording methodas set forth in claim 15, wherein the first copyright managementinformation and the second copyright management information arecopyright management information that are different from each other inmanagement conditions under which the plurality of pieces of contentdata are reproduced.
 17. The recording method as set forth in claim 16,wherein any one of the first copyright management information and thesecond copyright management information is management information thatrepresents reproduction permissions of the plurality of pieces ofcontent data, whereas the other copyright management information ismanagement information that represents partial reproduction permissionsof the plurality of pieces of content data.
 18. The recording method asset forth in claim 15, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin management conditions of the plurality of pieces of content data thanthe other copyright management information.
 19. The recording method asset forth in claim 18, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin reproduction restriction conditions of the plurality of pieces ofcontent data than the other copyright management information.
 20. Therecording method as set forth in claim 19, wherein any one of the firstcopyright management information and the second copyright managementinformation contains copy prohibition conditions of the plurality ofpieces of content data, whereas other copyright management informationcontains copy permission conditions of the plurality of pieces ofcontent data.
 21. The recording method as set forth in claim 20, whereinthe other copyright management information, which contains copypermission conditions of the plurality of pieces of content data, isrecorded in at least any one of the lead-in area and the lead-out area.22. The recording method as set forth in claim 20, wherein one of thefirst copyright management information and the second copyrightmanagement information, which contains copy prohibition conditions ofthe plurality of pieces of content data, is recorded in the datarecording area.
 23. The recording method as set forth in claim 14,wherein at least one of the plurality of pieces of content data isencrypted and recorded, and wherein the first copyright managementinformation and the second copyright management information are recordedalong with key data with which the encrypted piece of content data isdecrypted.
 24. The recording method as set forth in claim 23, whereinthe first copyright management information and the second copyrightmanagement information are encrypted and recorded along with the keydata with which the encrypted piece of content data is decrypted. 25.The recording medium recording method as set forth in claim 15, whereindata with respect to software for reading the other copyright managementinformation is recorded in the recording area, in which the plurality ofpieces of content data are recorded.
 26. A recording medium recordingapparatus, comprising: a head portion for recording data to a recordingmedium; an encode processing portion for performing an encoding processfor data to be recorded and supplying the encoded data to the headportion; and a controlling portion for recording a plurality of piecesof content data to the recording medium and controlling the head portionso that it records first copyright management information and secondcopyright management information with which copyrights of the pluralityof pieces of content data are managed to different position of therecording medium, the secrecies of the different positions beingdifferent from each other.
 27. The recording medium recording apparatusas set forth in claim 26, wherein the controlling portion is configuredto perform a control so that one of the first copyright managementinformation and the second copyright management information is recordedin at least any one of a lead-in area that is formed on an innerperiphery side of a recording area in which the plurality of pieces ofcontent data are recorded and a lead-out area that is formed on an outerperiphery side of the recording area, and wherein the controllingportion is configured to perform a control so that the other copyrightmanagement information is recorded in the recording area.
 28. Therecording medium recording apparatus as set forth in claim 27, whereinthe first copyright management information and the second copyrightmanagement information are copyright management information that aredifferent from each other in management conditions under which theplurality of pieces of content data are reproduced.
 29. The recordingmedium recording apparatus as set forth in claim 28, wherein any one ofthe first copyright management information and the second copyrightmanagement information is management information that representsreproduction permissions of the plurality of pieces of content data,whereas the other copyright management information is managementinformation that represents partial reproduction permissions of theplurality of pieces of content data.
 30. The recording medium recordingapparatus as set forth in claim 27, wherein any one of the firstcopyright management information and the second copyright managementinformation is stricter in management conditions of the plurality ofpieces of content data than the other copyright management information.31. The recording medium recording apparatus as set forth in claim 30,wherein any one of the first copyright management information and thesecond copyright management information is stricter in reproductionrestriction conditions of the plurality of pieces of content data thanthe other copyright management information.
 32. The recording mediumrecording apparatus as set forth in claim 31, wherein any one of thefirst copyright management information and the second copyrightmanagement information contains copy prohibition conditions of theplurality of pieces of content data, whereas other copyright managementinformation contains copy permission conditions of the plurality ofpieces of content data.
 33. The recording medium recording apparatus asset forth in claim 32, wherein the other copyright managementinformation, which contains copy permission conditions of the pluralityof pieces of content data, is recorded in at least any one of thelead-in area and the lead-out area.
 34. The recording medium recordingapparatus as set forth in claim 32, wherein one of the first copyrightmanagement information and the second copyright management information,which contains copy prohibition conditions of the plurality of pieces ofcontent data, is recorded in the data recording area.
 35. The recordingmedium recording apparatus as set forth in claim 26, wherein thecontrolling portion is configured to encrypt and record at least one ofthe plurality of pieces of content data and record the first copyrightmanagement information and the second copyright management informationalong with key data with which the encrypted piece of content data isdecrypted.
 36. The recording medium recording apparatus as set forth inclaim 35, wherein the controlling portion is configured to encrypt andrecord the first copyright management information and the secondcopyright management information along with the key data with which theencrypted piece of content data is decrypted.
 37. A recording mediumreproducing method, comprising the steps of: reading any one of firstcopyright management information and second copyright managementinformation from a recording medium comprising a lead-in area, a datarecording area that is formed on an outer periphery side of the lead-inarea and in which a plurality of pieces of content data is recorded, anda lead-out area formed on an outer periphery side of the data recordingarea, wherein the first copyright management information and the secondcopyright management information with which copyrights of the pluralityof pieces of content data are managed are recorded at differentpositions whose secrecies are different from each other; and controllingat least a reproducing operation for content data that is read from thedata area corresponding to the copyright management information that hasbeen read.
 38. The recording medium reproducing method as set forth inclaim 37, wherein any one of the first copyright management informationand the second copyright management information is recorded in any oneof the lead-in area and the lead-out area, the other copyrightmanagement information being recorded in the data recording area. 39.The recording medium reproducing method as set forth in claim 38,wherein data with respect to software for reading the other copyrightmanagement information is recorded on the recording medium, and whereinafter the data with respect to the software is read, the other copyrightmanagement information is read.
 40. The recording medium reproducingmethod as set forth in claim 37, wherein the first copyright managementinformation and the second copyright management information arecopyright management information that are different from each other inmanagement conditions under which the plurality of pieces of contentdata are reproduced.
 41. The recording medium reproducing method as setforth in claim 40, wherein any one of the first copyright managementinformation and the second copyright management information ismanagement information that represents reproduction permissions of theplurality of pieces of content data, whereas the other copyrightmanagement information is management information that represents partialreproduction permissions of the plurality of pieces of content data. 42.The recording medium reproducing method as set forth in claim 41,wherein one of the first copyright management information and the secondcopyright management information is recorded in at least any one of thelead-in area and the lead-out area.
 43. The recording medium reproducingmethod as set forth in claim 42, wherein the other copyright managementinformation of the first copyright management information and the secondcopyright management information is recorded in the data area.
 44. Therecording medium reproducing method as set forth in claim 37, whereinany one of the first copyright management information and the secondcopyright management information is stricter in management conditions ofthe plurality of pieces of content data than the other copyrightmanagement information.
 45. The recording medium reproducing method asset forth in claim 44, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin reproduction restriction conditions of the plurality of pieces ofcontent data than the other copyright management information.
 46. Therecording medium reproducing method as set forth in claim 37, wherein atleast one of the plurality of pieces of content data recorded in thedata recording area has been encrypted and recorded, wherein the firstcopyright management information and the second copyright managementinformation have been recorded along with key data with which theencrypted piece of the content data is decrypted, and wherein theencrypted data is decrypted with the key data read from the recordingmedium.
 47. The recording medium reproducing method as set forth inclaim 46, wherein the first copyright management information and thesecond copyright management information have been encrypted and recordedalong with the key data with which the encrypted piece of content datais decrypted, wherein another key data with which encrypted data isdecrypted has been recorded on the recording medium, and wherein with atleast the other key data read from the recording medium, the firstcopyright management information, the second copyright managementinformation, and the key data are decrypted.